...和控制废水排放的指定的设备，工厂或建筑物) point source discharger 点源的湍流扩散 point source turbulent diffusion 点逐次过度松弛法 point successive over-relaxation method ..
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把焊接电弧作为一个发尘点源，应用大气湍流扩散理论，建立了焊接过程中烟尘扩散的数学模型。
A mathematical model of fume diffusion in welding process was founded by considering welding arc as a spot source of generating fume and supplying the turbulent diffusion theory.
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